Ok
Try to boot in safemode to do so you have to hit the F8 button several times on restart and select safemode without networking and try there if it works then its and OS issue you can try running MSconfig by typing msconfig in run command and select startup tab thats on the right hand side of the window and selecte disable all and restart the system and try .

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Hold down the shift button for a few seconds to disable sticky keys. This is a windows feature to help people with disabilities and is activated and disabled by holding the shift button down for a few seconds. You can also disable it under start menu/programs/accessories/accessibility

Restart your computer repeatedly tapping the f8 key to enter safe mode while the screen is black once in safe mode where the only things working will be your keyboard and mouse allowing you to attempt to repair your computer Windows Advanced Options Menu Please select an option: Safe Mode Safe Mode with Networking Safe Mode with Command Prompt Enable Boot Logging Enable VGA mode Last Known Good Configuration (your most recent settings that worked) Directory Services Restore Mode (Windows domain controllers only) Debugging Mode Start Windows Normally Reboot Return to OS Choices Menu Use the up and down arrow keys to move the highlight to your choice select safe mode with command prompt Click start run type cmd press Enter black screen should open DOS mode this will vary depending on your operating system type in net user username For eg. If you want to change administrator password , type net user Administrator It will prompt you to enter the new password. Enter the new password and the password is changed if this fails you will need to Select safe mode with networking to download you could download all of these or just one save them to a usb drive for later use if one fails to remove the password Windows Password Recovery Basichttp://majorgeeks.com/CmosPwd_d239.html A CMOS BIOS password recovery tool Editors note: This tool should only be used by experienced computer users. Please see the enclosed read me if you would like to run it from Windows. Failure to follow instructions (from Windows) will cause your anti-virus to flag this as a virus. http://majorgeeks.com/Dr._Freeware_System_Utilities_d6416.htmlDr.Freeware System Utilities which includes data recovery software, data backup, password reset tools for Windows helps you to maintain your system. Dr.Freeware is freeware, you can download and use it for free.

Restart your computer repeatedly tapping the f8 key to enter safe mode while the screen is black once in safe mode where the only things working will be your keyboard and mouse allowing you to attempt to repair your computer Windows Advanced Options Menu Please select an option: Safe Mode Safe Mode with Networking Safe Mode with Command Prompt Enable Boot Logging Enable VGA mode Last Known Good Configuration (your most recent settings that worked) Directory Services Restore Mode (Windows domain controllers only) Debugging Mode Start Windows Normally Reboot Return to OS Choices Menu Use the up and down arrow keys to move the highlight to your choice select safe mode with command prompt Click start run type cmd press Enter black screen should open DOS mode this will vary depending on your operating system type in net user username For eg. If you want to change administrator password , type net user Administrator It will prompt you to enter the new password. Enter the new password and the password is changed if this fails you will need to Select safe mode with networking to download you could download all of these or just one save them to a usb drive for later use if one fails to remove the password Windows Password Recovery Basichttp://majorgeeks.com/CmosPwd_d239.html A CMOS BIOS password recovery tool Editors note: This tool should only be used by experienced computer users. Please see the enclosed read me if you would like to run it from Windows. Failure to follow instructions (from Windows) will cause your anti-virus to flag this as a virus. http://majorgeeks.com/Dr._Freeware_System_Utilities_d6416.htmlDr.Freeware System Utilities which includes data recovery software, data backup, password reset tools for Windows helps you to maintain your system. Dr.Freeware is freeware, you can download and use it for free.

No keys on my keyboard work.
Cause:
This issue is often caused by either a bad keyboard, bad interface board, and/or bad motherboard.
Answer:
Disconnect the keyboard from the computer and connect another known working keyboard to it. If this is a PS/2 keyboard and connecting multiple keyboards or a known working keyboard to the computer PS/2 port does not work unfortunately it's likely that the PS/2 port is bad. Because this port is part of the motherboard this will require that you replace the motherboard.
Alternatively if replacing the motherboard is too costly or not an effective solution you could also consider using a USB keyboard if USB ports are available on the computer.

Not all keys on keyboard work.

Reference number: CH000305
Not all keys on keyboard work.
Issue:
Not all keys on keyboard work.
Cause:
This issue is often caused by a bad keyboard or software preventing these keys to be pressed.
Additional information:
This document contains information about troubleshooting a keyboard that has some functioning keys. If no key on the keyboard is working see document CH000955.
Solution:
Verify that the key is not working in more than one application. It is possible that some keys may not be used in all programs. This generally always applies to the Function keys F1 through F12.
If not all keys are working in all programs and you have Windows, attempt to boot the computer to a MS-DOS prompt or safe mode and test the keyboard in DOS. Information about getting into safe mode can be found on document CHSFAFE and information on how to boot to DOS can be found on document CHDOS.
If it appears that a substance has been spilt into the computer, please review document CH000303.
If all above suggestions have been completed or if you are not running Windows, it is likely that the keyboard and/or keys are bad and it is recommended that the keyboard be replaced with a new one.